Year	% net
1998	59.14225
1999	59.74247
2000	57.27148
2001	58.34748
2002	61.08438
2003	61.12962
2004	63.31227
2005	63.49153
2006	65.44541
2007	64.50155
2008	65.64568
2009	66.88596
2010	68.70291
2011	69.06271
2012	68.44139
2013	67.90234